离心式压缩机轴承工作温度不应超过（）℃。
A.55
B.65
C.75
D.85
参考答案：B
病人呕吐鲜血约600ml，伴有烦躁不安、面色苍白，手足湿冷。脉搏106次/分，血压14.7/12.0kPa(110/90mmHg)。考虑此病人
A．中度休克B．休克代偿期C．大出血，但尚无休克D．重度休克E．虚脱
.----Is the girl ______ is interviewing the headmaster your friend?
----Yes, she is my best friend.
A. whom B. which C.. who
